Sauna heater



FIG. 1 is a perspective view of the sauna heater;

FIG. 2 is a perspective front view of the sauna heater;

FIG. 3 is a perspective right side view of the sauna heater;

FIG. 4 is a perspective left side view of the sauna heater;

FIG. 5 is a perspective rear view of the sauna heater;

FIG. 6 is a perspective top view of the sauna heater; and,

FIG. 7 is a bottom view of the sauna heater.

Broken lines shown in the drawings are for purposes of illustrating portions of the sauna heater and form no part of the claimed design. 

CLAIM The ornamental design for a sauna heater, as shown and described. 